VirtualBox network over host interface

#!/bin/bash

# install bridge utils
apt-get install bridge-utils

# create bridge
cat <> /etc/network/interfaces
auto br0
iface br0 inet dhcp
bridge_ports eth0
bridge_fd 2.5
EOF

# restart network
/etc/init.d/networking restart

# create an interface for a user
VBoxAddIF vbox0 $USERNAME br0